20220121011 has 16 divisors (see below), whose sum is σ = 28613888928. Its totient is φ = 12656985600.

The previous prime is 20220120989. The next prime is 20220121073. The reversal of 20220121011 is 11012102202.

It is not a de Polignac number, because 20220121011 - 2²⁵ = 20186566579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20220121091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449400 + ... + 492341.

It is an arithmetic number, because the mean of its divisors is an integer number (1788368058).

Almost surely, 2^20220121011 is an apocalyptic number.

20220121011 is a deficient number, since it is larger than the sum of its proper divisors (8393767917).

20220121011 is a wasteful number, since it uses less digits than its factorization.

20220121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942182.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20220121011 its reverse (11012102202), we get a palindrome (31232223213).

The spelling of 20220121011 in words is "twenty billion, two hundred twenty million, one hundred twenty-one thousand, eleven".